Development of an intelligent system for the determination of rupture-related characteristics in intracranial aneurysms detected by Computed Tomography Angiography

Petros Zampakis, Nontas Ntzanis, Vasilios Panagiotopoulos, Fotis Anagnostopoulos, Gerasimos A.T Messaris, Christina Kalogeropoulou, Constantinos Koutsojannis

Abstract


Purpose: Aim of this study was the development of an intelligent system (IS) that can determine the rupture-related characteristics in intracranial aneurysms detected by computed tomography angiography.

Material and Methods: 100 intracranial aneurysms in 100 patients (74% ruptured) were analysed. An IS was developed based on machine learning (ML) algorithm (WEKA J48 software). The IS used measurements, morphological characteristics and location of the aneurysms, as well as patients’ age. 70 aneurysms were used as the training set, while 30 aneurysms were used as the test set.

Results: Using training set, our model along with Neuroradiologist interaction indicated the following: The two most important rupture-related aneurysmal characteristics were dome/neck ratio ≥1.96 and irregular shape (regardless of location). Other rupture-related characteristics included anterior circulation aneurysms that were irregular in shape (regardless of dimension) and posterior circulation aneurysms with maximum dimension ≤6.7 mm (regardless of shape). A negative-related characteristic for rupture included posterior circulation aneurysms with wide neck and maximum dimension >6.7 mm. The accuracy of the IS in our test set was 80%. Age did not influence aneurysmal risk status.

Conclusions: In the present study we developed an IS which, based on certain aneurysmal parameters, can accurately identify rupture-related characteristics. As a result of the interaction between ML algorithms and clinical expert, a number of rules were created that can be further evaluated in larger studies.


Keywords


Intracranial aneurysm/risk factors; Rupture; CT angiography; Intracranial aneurysm; Rupture; Machine learning

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References


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DOI: http://dx.doi.org/10.36162/hjr.v5i4.376

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